GG25 is the most common flake cast iron grade. It offers a good combination of strength and wear resistance. It is recommended for uses where a balance is required between mechanical and characteristics and machinability. Cast iron with flake graphite, predominant pearlitic structure. Heat treatment is not recommended.

Offers a higher wear resistance, strength and heat treatment response compared to GG20 and GG25 while still possessing reasonable machinability and excellent surface finish. GG30 can be hardened by conventional methods to RC 50 on the bar surface.

GGG40 is the most common used nodular cast iron. Nodular cast iron has predominately a ferritic structure. Offers superior machinability combined with optimal impact, fatigue, electrical conductivity and magnetic permeability. For use beneath 0°C on a special grade (GGG40.3 or EN-GJC400-18-LT) can be produced with a very high impact test value.